Call (Call Subroutine) - Fujitsu FR Family Instruction Manual

CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.89

CALL (Call Subroutine)

This is a branching instruction with no delay slot.
After storing the address of the next instruction in the return pointer (RP), a branch to
the address indicated by "Ri" occurs.
■ CALL (Call Subroutine)
Assembler format: CALL @Ri
PC + 2 → RP
Operation:
Ri → PC
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: 2 cycles
Instruction format:
Example: CALL @R1
186
N Z V C
– – – –
MSB
1 0 0 1
Instruction bit pattern : 1001 0111 0001 0001
R1
F F F F F 8 0 0
PC 8 0 0 0 F F F E
x x x x x x x x
RP
Before execution
0 1 1 1 0 0
LSB
0 1 Ri
R1
F F F F F 8 0 0
PC
F F F F F 8 0 0
RP
8 0 0 1 0 0 0 0
After execution